Priming cup



Dec. 29 1925. 1,567,547

O. A. SMITH PRIMING CUP Filed July 1'7, 1924 ',umm u I@ ME ATTORNEPatented Dec. 29, 19325.

UNITED sTATEs TATENT OFFICE. y

OSCAR AUGUST SMITH, OF EAST CLEVELAND, OHIO; THE CLEVELAND TRUST COM-PANY ADMINISTRATOR OF SAID OSCAR A. SMITH, DECEASED.

PRIMING CUP.

Application filed. July 17, 1924. Serial No. 726,475.

To all 'whom t may concern:

Be it known that I, OscAn A. SMITH, a citizen of the United States,residing at East Cleveland, in the county of Cuyahoga and State of Ohio,have invented certain new and useful Improvements in Priming Cups, ofwhich the following is a specification.

This invention relates to priming cups for gas engines or motors, anobject thereof being to provide an improved gasoline priming cup simplein construction, durable in use, readily operated, and which can bemanufactured at a minimum of expense, the primary object of theinvention being to provide a priming cup'of reduced size with a gasolinereceiving or cup chamber of increased capacity.

The present improved priming cup is an improvement in part upon thatshown and VVdescribed in my prior Patent No. 1,440,844 dated January 2,1923. In that patent in order to obtain a cup chamber of large capacityit was necessary to make the entire article of comparatively large size.

In the present improvement the article is materially reduced in size ascompared with that shown in said patent while the chamber or cup portionthereof however, is materially increased in size, thereby giving anequal or larger capacity to the cup chamber than was possible in thepriming cup of the patent referred to. Thus I am able to obtain a smallpriming cup having a chamber of greater capacity than heretofore, thusenabling the article to be made much cheaper since there is aconsiderable saving of material in the manufacture of the article, andtherefore the cup can be sold much cheaper. In other words, in thepresent improvement the cost of production is materially decreasedwithout in any way decreasing the capacity of the gasoline chamber orcup portion.

In the drawings accompanying and forming a part of this specification,Fig. 1 illustrates a side view of one form of this improved cup; Fig. 2is a vertical sectional view thereof; Fig. 3 is a top view; Fig. 4 is aside view of another form thereof; and Fig. 5 is a vertical sectionalview of the construction shown in Fig. 4.

Similar characters of reference indicate corresponding parts in theseveral drawings.

Before explaining in detail the present improvement and mode ofoperation thereof, I

gine.

desire to have it understood that the invention is not limited to thedetails of construction and arrangement of parts which are illustratedin the accompanying drawings, since the invention is capable of otherembodiments, and that the phraseology which I employ is for the purposeof description and not of limitation.

In the preferred form thereof herein shown and described this improvedprimmg cup, which is adapted for various purposes, comprises a bodymember 10 consisting of a chambered and interiorly threaded nut portion11 having a threaded projection or stem 12 to permit the device to beattached to the cylinder head of the en- This body member is provided onthe interior thereof with a tapered part 13 for seating the lower end ofthe cup proper, the nut portion being provided with in terior threads 14above the seat. Screwing into the nut portion of the body member 1s acup member 15 having an exteriorly threaded projection or stem 16cooperating with the interior threads of the body member. This threadedportion 16 is chambered as at 17 and together with the enlarged chamber18 above it forms the gasoline receiving chamber 01 cup proper of thedevice.

Secured to the bottom wall of the chamber portion 17 as by heading ittherein is a valve stem 19, of less diameter than the bore 23 of thebody, carrying a valve 2O and the bottom wall of the chamber 17 isprovided with openings shown as two in number 25 for the passage of thegasoline to the cylinder when the valve is open.

The construction so far described applies to both forms of priming cupsshown. In the forms shown in Figs. 1 and 2 however, the stem 19 has itsvalve 20 opening in the direction of the flow of the fluid, this valvebeing tapered so as to seat against the lower edge 21 of the body stem.In the form shown in Figs. 4 and 5 the valve stem is also provided witha tapered valve, seating however, in the direction of the flow of theiiuid and fitting against the edge of an opening 21' of the valve bodystem which is ianged or inturned for this purpose as at 22.

In the present improvement it will thus be observed that the cup screwsinto the body instead of on to the body as shown in my prior patentreferred to, and that the body, which permits the capacity of the cup tobe materially increased, the entire article can be made of much smallersize than that shown and described in my patent referred to, andconsequently the article can be produced at less cost and therefore soldmuch cheaper. rllhe cup portion is provided with an external hnurledportion 26 to facilitate the opening and closing of the cup and 1t willbe observed that when the body member is yscrewed into the engine thatby turning lthe cup in one direction the valve will be opened and inthe' other direction it will be closed. 1n the Yform shown in Figs-1 and2 by' turning the cup toward the right the valve will be closed and byturning it toward the left it will be opened, thus dra-wing the valvewhen the cup is closed against the seat, while in the form shown inFigs. i and 5 by turning the cup to the right it will be opened and byturning it to the left it will be closed, the turning of the cup to theleft forcing the valve to its seat.

By means of the foregoing improvement l am able to provide a muchsmaller cup 'having a larger shiftable fluid receiving` chamber than hasheretofore been possible in constructions of this kind, since it will beobserved that the body member comprises a projecting threaded stemadapted to fit into the cylinder of the engine while t-he cup memberlikewise comprises a projecting threaded stem fitting into the bodymember,

which stem is utilized by chambering it to increase the capacity of thecup while permittinfr the size or diameter of the article to bematerially reduced. Thus the cup member has a chamber of three differentdiameters all located above the perforated bottom Vwall thereof, so thatwhen the Huid passes through the perforations in the bottom wall of thecup member it passes directly into the passage' 23 of the body member,thus as hereinbefore stated enabling the cup member to be made togetherwith its bottom wall of an integral construction.

is a result of this improved construction, it will be observed that theexteriorly threaded stems of the fluid cup member and of the body memberare of substantially the same diameter while the extended chamberportion 17 of the cup member is shown of greater diameter than thepassage through the body stem, which thus enables the formation of anuninterrupted chamber in the cup member of very much increased capacity.

1t is to be understood that by describing in detail herein anyparticular form, structure or arrangement, it is not intended to limitthe invention beyond the terms of the several claims or the requirementsof the prior art. Y

Having thus explained the nature of my said invention and described awayof constructing and using the same, although without attempting toset forth all of the forms in which it may be made, or all ofthe modesof its use, l claim:

l. A priming device comprising a body member having an eXteriorlythreaded hollow stem provided with a valve seat and an enlargedinteriorly threaded chamber yof materially greater interior diameterthan the interior diameter of said hollow stem, a shiftabl-efluid-receiving chamber having an extended chamber portion exteriorlythreaded into the chamber of the body and having an interior diameter asgreat as the interior diameter of the hollow stem, thereby ymateriallyincreasing the capacity of the fluidreceiving chamber, and provided witha depending valve stem having a valve c0- cperating with said valveseat.

Q. A priming device comprising a body member having an exteriorlythreaded hollow stem provided with a valve seat at its lower. end, andan enlarged interiorly threaded chamber of materially greater interiordiameter than the interior diameter of said hollow stem, a shiftablefiuid-receiving chamber having an extended Chamber portion exteriorlythreaded into the chamber of the body and having an interior diameter asgreat as the interior of the hollow stem, thereby materially increasingthe capacity of the fluid-receiving chamber, and provided with adepending valve stem having a valve cooperating` with said valve seat.

3. A priming device comprising a body member having an eXteriorlythreaded hollow stem provided with a valve seat, and an enlargedinteriorly threaded chamber of materially greater interior diameter thanthe interior diameter of said hollow stem, a shiftable Huid-receivingchamber having an extended chamber portion exteriorly threaded into thechamber of the body and having an interior diameter as great as theinterior diameter of the hollow stem, thereby materially increasing thecapacity of the fluid-receiving chamber and provided with a dependingvalve stem having a valve cooperating with said valve Seat and openingin the direction of the flow of the fluid.

4t. A priming device comprising a body member having an exteriorlythreaded hollow stem provided with a valve seat, and an enlargedinteriorly threaded chamber of materially greater interior diameter thanthe interior diameter of said hollow stem, a shiftable fluid-receivingchamber having an extended chamber portion exteriorly threaded into thechamber of the body and having an interior diameter as great as theinterior diameter of the hollow stem, thereby materially increasing thecapacity of the fluid-receiving chamber and provided with a perforatedbottom Wall, and a depending valve stein connected With said bottom Walland having a valve cooperating with said valve seat.

5. A priming device comprising a body member having an exteriorlythreaded hollovv stem rovided With a valve seat, and an enlargecinteriorly threaded chamber of materially greater interior diameter thanthe interior diameter of said hollow stem1 a shiftable fluid-receivinchamber having an extended chamber portion exteriorly threaded into thechamber of the body and having an interior diameter as great as theinterior diameter of the hollow stem, thereby materially increasing thecapacity of the Huidreceiving chamber and provided With a perforatedbottom Wall, and a depending valve stem connected with said bottom Walland having a valve cooperating With said valve seat, said valve openingin the direction of the flow of the fluid.

Signed at Cleveland Ohio this 14th day of July, 1924.

OSCAR AUGUST SMITH.

